A 1-megawatt sand battery that can store up to 100 megawatt hours of thermal energy will be 10 times larger than a prototype already in use. The new sand battery will eliminate the need for oil-based ...

The system works like a toaster crossed with a blast furnace. Electricity from solar arrays heat iron wires similar to those in a toaster oven. These warm hundreds of tonnes of refractory bricks to ...

While hydrogen's high energy per mass makes it an excellent fuel, it's awfully hard and expensive to store long-term. That could change, thanks to the work of researchers at Switzerland's ETH Zurich.

Electricity demand could increase up to 16 percent across the United States by 2030, requiring up to a six-fold increase in the pace of building new generation and transmission. Can solar-plus-storage ...